<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
        "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <title>jQuery失去焦点事件</title>
    <meta charset="utf-8">
   
</head>
    <body>
        姓名：<input type="text" name="username"/><br>
        密码：<input type="password" name="password"/><br>
    </body>
</html>